Journal
JOURNAL OF OPTICS
Volume 18, Issue 9, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/18/9/094007
Keywords
quantum walks; fiber cavities; time-bin quantum coding; multiport interference; Boson sampling
Categories
Funding
- Marie Curie Actions within the Seventh Framework Program for Research of the European Commission, under the Initial Training Network PICQUE (Photonic Integrated Compound Quantum Encoding) [608062]
- European Union [658073]
- ERC [641039]
- UK EPSRC [EP/K034480/1]
- Engineering and Physical Sciences Research Council [EP/K503769/1, EP/K034480/1] Funding Source: researchfish
- EPSRC [EP/K034480/1] Funding Source: UKRI
- Marie Curie Actions (MSCA) [658073] Funding Source: Marie Curie Actions (MSCA)
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We demonstrate a platform for implementing quantum walks that overcomes many of the barriers associated with photonic implementations. We use coupled fiber-optic cavities to implement time-bin encoded walks in an integrated system. We show that this platform can achieve very low losses combined with high-fidelity operations, enabling an unprecedented large number of steps in a passive system, as required for scenarios with multiple walkers. Furthermore the platform is reconfigurable, enabling variation of the coin, and readily extends to multidimensional lattices. We demonstrate variation of the coin bias experimentally for three different values.
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